Why only localhost works in mamp?

Question

Apache HTTP Server

When creating another domain and opening it in the browser, an error occurs:

At the same time, if you go to localhost, the start page is displayed:

Answer 1

Everything worked, the problem was that my VPN worked all this time

Answer 2

The project folder is uploaded to the htdocs folder. In the browser, you should see your project's main page at: localhost/yout-project